
    public class ConstructionBank extends Bank {
        double year;
        public double computerInterest() {
            super.year=(int)year;
            double r = year-(int)year;
            int day=(int)(r*1000);
            double yearInterest = computerInterest();//super调用隐藏的computerInterest()方法
            double dayInterest = day*0.0001*savedMoney;
            interest= yearInterest+dayInterest;
            System.out.printf("%d元存在建设银行%d年零%d天的利息:%f元\n",
                    savedMoney,super.year,day,interest);
            return interest;
        }

    }
